diff --git a/libctru/include/poll.h b/libctru/include/poll.h
index 4bfbae3..443b554 100644
--- a/libctru/include/poll.h
+++ b/libctru/include/poll.h
@@ -1,11 +1,13 @@
 #pragma once
 
-#define POLLIN		0x01
-#define POLLPRI		0x02
-#define POLLHUP		0x04 // unknown ???
-#define POLLERR		0x08 // probably
-#define POLLOUT		0x10
-#define POLLNVAL	0x20
+#define POLLIN          0x01
+#define POLLPRI         0x02
+#define POLLWRNORM      0x08
+#define POLLWRBAND      0x10
+#define POLLNVAL        0x20
+#define POLLHUP         0x00 // Unknown?
+#define POLLERR         0x00 // Unknown?
+#define POLLOUT         POLLWRNORM
 
 typedef unsigned int nfds_t;